<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
  <title>Document</title>
</head>
<body>
  <button type="button" class="btn btn-success">（成功）Success</button>
  <div class="btn btn-success">登录</div>
  <div class="btn btn-danger">未成功</div>
</body>
</html>